This document specifies the requirements for creating sector-specific standards that extend ISO/IEC 27001, and complement or amend ISO/IEC 27002 to support a specific sector (domain, application area or market). This document explains how to: — include requirements in addition to those in ISO/IEC 27001, — refine or interpret any of the ISO/IEC 27001 requirements, — include controls in addition to those of ISO/IEC 27001:2013, Annex A and ISO/IEC 27002, — modify any of the controls of ISO/IEC 27001:2013, Annex A and ISO/IEC 27002, — add guidance to or modify the guidance of ISO/IEC 27002. This document specifies that additional or refined requirements do not invalidate the requirements in ISO/IEC 27001. This document is applicable to those involved in producing sector-specific standards.